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USB composite device example program, drag-and-drop flash writer.
Dependencies: SWD USBDevice mbed BaseDAP
USBMSD_Drop/USBMSD_Drop.cpp
- Committer:
- va009039
- Date:
- 2013-09-28
- Revision:
- 1:ea8e179320d7
File content as of revision 1:ea8e179320d7:
// USBMSD_Drop.cpp 2013/9/26 #include "mbed.h" #include "USBMSD_Drop.h" //#define MY_DEBUG #include "mydebug.h" USBMSD_Drop::USBMSD_Drop() { _seq = 0; _file = NULL; _drop_evt = NULL; _status = 0x01; connect(); } void USBMSD_Drop::attach(void (*fptr)(const uint8_t* data, int len, int offset, int total)) { _drop_evt = fptr; } /* virtual */ int USBMSD_Drop::disk_initialize() { _status = 0x00; return 0; } /* virtual */ int USBMSD_Drop::disk_status() { return _status; } /* virtual */ int USBMSD_Drop::disk_read(uint8_t * data, uint64_t block) { return _disk.read(data, block); } /* virtual */ int USBMSD_Drop::disk_write(const uint8_t * data, uint64_t block) { DBG("seq=%d block=%d", _seq, (int)block); DirEntry* entry; switch(_seq) { case 0: if (_disk.is_fat(block)) { break; } if (_disk.is_rootdir(block)) { entry = findNewFile(data, block); if (entry) { _file = entry; } break; } if (_file && _disk.cluster_to_sector(_file->cluster) == block) { // file head ? _addr = 0; _drop(data, 512, _addr, _file->size); _prev_block = block; _addr += 512; _seq++; } break; case 1: if ((_prev_block+1) != block) { _seq = 0; break; } _drop(data, 512, _addr, _file->size); _prev_block = block; _addr += 512; if (_addr >= _file->size) { // file tail ? _seq = 0; } break; } return _disk.write(data, block); } /* virtual */ uint64_t USBMSD_Drop::disk_sectors() { return _disk.sectors(); } /* virtual */ uint64_t USBMSD_Drop::disk_size() { return _disk.sectors() * 512; } void USBMSD_Drop::_drop(const uint8_t* data, int len, int offset, int total) { Drop(data, len, offset, total); if (_drop_evt) { _drop_evt(data, len, offset, total); } } DirEntry* USBMSD_Drop::findNewFile(const uint8_t* data, uint32_t block) { int cnt = _disk.dir_count(block); if (cnt == (-1)) { return NULL; } CT_ASSERT(sizeof(DirEntry) == 32); if (cnt == 0) { _result = NULL; } for(int pos = 0; pos < 512; pos += sizeof(DirEntry)) { DirEntry* entry = reinterpret_cast<DirEntry*>((uint8_t*)data+pos); if (entry->is_file() && entry->size > 0) { if (_result == NULL || entry->cmpDateTime(_result) > 0) { _dir_entry = *entry; _result = entry; } } } if (_result == NULL) { return NULL; } //DBG_HEX((uint8_t*)&_dir_entry, sizeof(DirEntry)); return &_dir_entry; }